micheleandClaude Sonnet 5
c0eee4a4ad
BT1035Driver::boot() had zero retry on the reset+AT-init sequence — a
single hardware RESET# pulse followed immediately by AT commands,
with no second attempt if the module didn't come up in time. This is
the most plausible explanation for the intermittent "no spontaneous
UART bytes after hardware reset" / "AT init failed" boot failures
logged in docs/si4684-rf-investigation-report.md and observed again
live this morning on otherwise-identical hardware/wiring — classic
power-up timing jitter, not a permanent fault. Extracted the reset+
init sequence into resetAndInitOnce() and wrapped it in a 3-attempt
retry loop with a short delay between attempts; the one-time GPIO
config and UART driver install stay outside the loop since they don't
need repeating. Root cause of the underlying jitter is still open.
BluetoothJson.hpp was the only *Json.hpp module in the core with zero
host test coverage (status/scan/paired serialisation, auto-reconnect/
connect/speaker parsing) — every sibling module already has one.
Added bluetooth_json_test.cpp following the existing tuner_json_test
pattern; ctest now covers 20 suites instead of 19.
Documentation catch-up, found doing a full firmware re-review at the
user's request:
- POST /api/tuner/calibrate-antenna and the antcap field on
POST /api/tuner/tune (added in a previous commit, never documented)
are now in ch-api.tex.
- kFirmwareVersion was still hardcoded "0.8.5" despite the RF fixes,
BLE provisioning, phone streaming, antenna calibration, and generic
DSP param API landed since that version's actual release commit
(0a1188a). Bumped to 0.9.0 everywhere it's mentioned (health JSON,
the manual's title page, intro, classes, and API chapters).
- instructions.md and docs/TODO.md still described the firmware as
frozen at 0.8.5 awaiting hardware-in-the-loop testing that has since
happened extensively; docs/TODO.md's H5 verdict specifically still
said "suspect U6 RF ground (re-open PCBWay)" for a bug that turned
out to be firmware, not hardware — actively misleading, corrected.
Both files now summarise the post-0.8.5 HIL findings and current
open items (BT1035 root cause, intermittent HTTP unresponsiveness
under load, antenna-limited signal quality, possibly-undersized 24 KB
nvs partition).
Verified: idf.py build, doxygen (0 warnings), check-manual-sync,
check_si4684_blobs, ctest (20/20), two-pass xelatex manual build all
green. Flashed and confirmed live: fw reports 0.9.0, BT1035 booted on
the first attempt post-flash.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0178rASQ6ZETPMUamvpoR2KR
DigiRadio Firmware
Open-source Hi-Fi DAB+/FM receiver firmware for the ESP32-S3.
Status: fw 0.8.5 on main — BT1035 I2S slave boot init, dual OTA + DSP blob updates, EEPROM identity,
NVS + flash encryption (development mode), tabbed Web UI with System uploads,
15 host tests, 4 CI jobs. Agent tasks T1–T12 complete; device HIL pending
first PCB.
| Area | Shipped in 0.8.5 |
|---|---|
| Boot | Si4684 HOST_LOAD, ADAU1701 RAM program, BT1035 I2S slave init (AUXCFG=3, I2SCFG=67) |
| Tuner | FM/DAB tune, seek up/down, RSQ, RDS, DAB services + DLS |
| Audio | 6-band EQ, mixer, stereo/bass enhance, NVS profile |
| Updates | ESP32 dual-OTA, ADAU1701 dsp partition blob replay |
| Identity | 24AA025E48 EUI-48 → serial, SoftAP/BT name suffix |
| Presets | CRUD, reorder, integrated recall + last-preset at boot |
| Network | SoftAP/STA, tabbed gzipped SPA, typed JSON REST API |
| Security | initEncryptedStorage() — see docs/security-flash-nvs.md |
| Quality | Doxygen, manual sync, Si4684 blob policy check |
Architecture: functional core (components/core, host-tested, no ESP-IDF) +
imperative shell (drivers, services, net, secure_store). Rules:
AGENTS.md · backlog: docs/TODO.md
Prerequisites
Si4684 blobs (proprietary, local only — not in git):
python3 tools/fetch_si4684_firmware.py --dab-only
python3 tools/fetch_si4684_firmware.py --si46xx-dir /path/to/si46xx_firmware
python3 tools/check_si4684_blobs.py
See Firmware/Si4684-Firmware/README.md.
ESP-IDF v5.5.x, target esp32s3.
Quick start
Open this directory (Software/) as the Cursor project so AGENTS.md and
.cursor/rules/ load automatically.
idf.py set-target esp32s3
idf.py build
idf.py erase-flash flash # once when first enabling encryption (0.8.3+)
idf.py -p <port> monitor
Production flash-encryption release mode: overlay sdkconfig.defaults.production
(see security doc — irreversible on chip).
Host tests
Pure core, no hardware (needs C++23 compiler on macOS — Homebrew llvm or GCC 14):
cmake -S components/core/test -B build-host \
-DCMAKE_CXX_COMPILER="$(brew --prefix llvm)/bin/clang++"
cmake --build build-host
ctest --test-dir build-host --output-on-failure
Quality gates (CI on every push to main)
Run from Software/:
doxygen Doxyfile
python3 tools/check-manual-sync.py
python3 tools/check_si4684_blobs.py
tools/gzip-www.sh # after editing components/net/www/index.html
CI jobs: host-tests, doxygen, manual-sync, si4684-blobs
(.github/workflows/ci.yml).
Web UI
Gzipped single-page app at / — tabs: Now (RDS/DLS), Radio, Presets,
Audio (6-band EQ), BT, Wi‑Fi, System (firmware OTA + DSP upload).
Header shows EEPROM serial from /api/health. Source:
components/net/www/index.html · regenerate embed:
tools/gzip-www.sh.
HTTP API (fw 0.8.5)
| Method | Path | Purpose |
|---|---|---|
| GET | /api/health |
Status, firmware version, serial, companion-chip flags |
| POST | /api/wifi |
Provision STA credentials; reboot on success |
| GET | /api/tuner/status |
Tuner snapshot (DAB/FM, RDS/DLS metadata) |
| GET | /api/tuner/services |
DAB service list for current ensemble |
| POST | /api/tuner/tune |
Tune DAB ensemble or FM frequency |
| POST | /api/tuner/play |
Start DAB service playback |
| POST | /api/tuner/seek |
FM seek up or down ({"direction":"up|down"}) |
| GET/PUT | /api/audio/profile |
Read/apply ADAU1701 mixer + 6-band EQ |
| POST | /api/audio/reset |
Factory-flat audio profile |
| POST | /api/audio/stereo-enhance |
Stereo depth overlay (0–100) |
| POST | /api/audio/bass-enhance |
Bass enhance overlay (0–100) |
| POST | /api/dsp/program |
Upload ADAU1701 DRAD blob (raw bytes, reboot) |
| POST | /api/system/ota |
Upload ESP32 firmware image (raw bytes, reboot) |
| GET | /api/bluetooth/status |
BT1035 boot, pairing, A2DP, name, auto-reconnect |
| GET | /api/bluetooth/paired |
Paired-device list from module |
| POST | /api/bluetooth/pair |
Enter discoverable mode |
| POST | /api/bluetooth/pair/stop |
Leave discoverable mode |
| POST | /api/bluetooth/disconnect |
Release A2DP session |
| POST | /api/bluetooth/auto-reconnect |
Set auto-reconnect count (0–15) |
| GET | /api/stations |
List saved presets |
| POST | /api/stations |
Add preset |
| POST | /api/stations/remove |
Remove preset by index |
| POST | /api/stations/reorder |
Move preset (from/to indices) |
| POST | /api/stations/tune |
Recall preset (tuner + audio profile + NVS) |
Wire schemas: docs/manual/ch-api.tex · C++ API:
doxygen Doxyfile → docs/api/html/index.html.
Layout
| Path | Role |
|---|---|
Firmware/ |
Si4684 .bin (local) + ADAU1701 SigmaStudio export |
components/core/ |
Pure domain (host-tested) |
components/drivers/ |
Si4684, ADAU1701, BT1035 |
components/services/ |
Tuner, audio, Bluetooth, station, integration |
components/secure_store/ |
Encrypted NVS: credentials, profiles, presets |
components/net/ |
Wi-Fi, HTTP server, gzipped web UI |
sdkconfig.defaults |
C++23, NVS + flash encryption (dev mode) |
partitions.csv |
nvs, otadata, dual OTA (ota_0/ota_1), dsp blob, nvs_keys |
docs/manual/ |
LaTeX technical manual |
docs/security-flash-nvs.md |
Encryption + device HIL checklist |
docs/TODO.md |
Completed tasks + HIL backlog |
tools/ |
Blob fetch, CI policy checks, UI gzip |
Manual PDF: cd docs/manual && latexmk -lualatex manual.tex
Licence
Apache-2.0 — see LICENSE.